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## Homework Statement

My question is not a homework problem. I am having difficulty in understanding the concept oof contact forces.

## Homework Equations

What I don't understand is that when two bodies A and B are in contact and left on a frictionless surface, they apply normal reactions on each other, then why doesn't that normal reaction force give some acceleration to the blocks and they move away from each other?

## The Attempt at a Solution

The only viable solution I can come up with is that the normal reaction is zero, but they why it would be zero I don't know.